Another quick trip to Fernhill Wetlands this afternoon produced a couple of species that were not present a few days ago.
A Long-billed Dowitcher (left) and a Pectoral Sandpiper. Both birds are in juvenal plumage, indicated by the pale edges on the scapulars and wing coverts which create a scaly pattern. The Pectoral has a clump of mud on the base of his bill.
Another view of the Pectoral Sandpiper with two Long-billed Dowitchers. The crouching posture suggests that the bird is on alert and ready to flush. That is a good clue for the birder to back off.
Greater Yellowlegs on the left, Lesser Yellowlegs on the right
Ethical Birder 
